ML18352A318

Licensee Event Report ER-76-25 - Hydrogen Recombiner, a Condition Leading to Operation on a Degraded Mode

ML18352A318
Person / Time
Site:	Palisades
Issue date:	09/10/1976
From:	Bixel D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1976-025-00
Download: ML18352A318 (2)

Text

consumers

• Power company General Offices: 212 West Michigan Avenue, .Jackson, Michigan 49201

• Area Code 517 788-0550 September 10, 1976 Mr James G. Keppler Office of Inspection & Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR-20 PALISADES PLANT, ER-76-25

• HYDROGEN RECOJ'v'IBINER Attached is a reportable event related to the Palisades Plant. This event has been ciassified as a condition leading to operation in a degraded mode.

David A. Bixel Assistant Nuclear Licensing Administrator SEP 1 5 1976

LICENSEE EVENT REPORT CONTROL BLOCK: I I I I I [PLEASE PRINT ALL llllEQUIRED INFDRMAYDClll]

1 LICENSEE S LICENSE EVENT

• NAME LICENSE NUMBER TYPE TYPE

@E] I M I r I PI A I L I 1 I I oI ol-1 oI oI ol ol o 1-1 oI oI l411l1l1l1I Io I 3 I 7 8 9 14 15 25 26 30 31 32 REPORT REPORT TYPE. . SOURCE OOCKE;T NUMBER EVENT DATE REPORT DATE

@:I!] CON'T __.___.I

._I llJ lJ;J lo I 5 I o I-lo 12 I 5 I 5 I lo I8 I1 I 3 I 7 I 6I Io 75 I 9 . I o I 9 I 11 8061 7 8 57 58 59 60 61 68 69 74 EVENT DESCRIPTION lol 21 I While performing the semiannual operational check of the two hydrogen recombiners, I 7 8 9 80 lol3l I Unit M69B could o~ly be loaded to 43 kW and the resulting heater temperature was I 7 8 9 80 lol4l I 170°F below the temperature required by Technical Specification 4.2.2.12.b.4 I 7 8 9 *BO 101511 (1200°F). The heater met the requirements of the six-month test but would not meet I 7 8 9 80

&lliJ I the requirements of the 18-month test. The unit is considered inoperable. (ER-76-251) 7 8 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUER MANUFACTURER VIOLATION

@El I sl El L!l IRIElclol MIBI ~ IW 11 12 I 0 I l!J 7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION lol0I I The preliminary inspection indicates that one phase of the heater is grounded. A I 7 8 9 80

~ I detailed investigation will be made at the next plant cold shutdown. In addition I 7 8 9 . 80

~ I to the 100% redundant recombiner unit the containment purge system is (see Line 18) I

~9 METHOD OF 80 FACILITY 7

EEJ 8 STATUS w

9 10

% POWER 12 13 OTHER STATUS I 0 I 9 I 9 I ._____N_A_ ____.I 44 w

DISCOVERY 45 46 DISCOVERY DESCRIPTION NA BO FORM OF ACTIVITY CONTENT 7

rn 8 RELEASED 9

W OF RELEASE 10 11 AMOUNT OF ACTIVITY W .,._I______;;;.NA=--_ __.I 44 45 LOCATION OF RELEASE NA 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION QEJ I 01 o I o I ~ NA 7 8 9 11 12 13 80 PERS"ONNEL INJURIES NUMBER DESCRIPTION EE] I ol o I oI NA 7 8 9 11 12 80 PROBABLE CONSEQUENCES

~ I None - Redundant systems are available.

7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~L.3 NA 7 8 9 10 80 PUBLICITY (20 None 7 B 9 BO

~ ADDITIONAL FACTORS

~ I (Contd From Line 10) available. Either system is capable or maintaining H below 2

I 7 B 9 BO l!Ifil I the combustible limit during post LOCA conditions.

7 8 9 80